Editable attributes in Collector maps

I have created several Collector maps and configured pop-ups for each feature class I want to include in data collection and editing.

When I configure the pop-ups for which attributes display and which are editable, I find that for some maps this information is correctly saved, but for others, even though I marked specific fields as editable (and saved the pop-up and saved the map), when I test it out in Collector, ALL fields are editable.

I can't tell any difference between these maps and these pop-ups, but there are differences when they're saved.